CFD Online Logo CFD Online URL
Home > Forums > CFX

Floating point exception: Overflow?

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   February 1, 2008, 09:36
Default Floating point exception: Overflow?
Posts: n/a
Hi, when I run the solver it complete 9 iterations but then i get this error:

ERROR #001100279 has occurred in subroutine ErrAction. | Message: | | Floating point exception: Overflow

what causes this error?
  Reply With Quote

Old   February 1, 2008, 13:29
Default Re: Floating point exception: Overflow?
CFD newbie
Posts: n/a
I am having same problem, please let me know how to resolve the issue if you find out. My solver crashes after 2 time steps.

CFD newbie
  Reply With Quote

Old   February 1, 2008, 19:26
Default Re: Floating point exception: Overflow?
Posts: n/a
Hi, I get this error quite often when residual levels go very down (up to 10^-7 or 10^-8) at a sudden and the solver crashes.

Bascially I feel safe to assume that it happens when the solver is unable to hande the numerics occuring.

Try reducing your time step for transient flow or 'false time step' for steady state flow. Make sude that your initial guess is not making any disaster.

And if you get some better answer, please share with us. I will love to know.

Regards, KK
  Reply With Quote

Old   December 15, 2009, 12:37
Join Date: Sep 2009
Location: Cranfield
Posts: 48
Rep Power: 8
c120613 is on a distinguished road
Hi KK,

but which values are reasonable for the "false time step" (steady case).
How can I calculate an approximate value?

c120613 is offline   Reply With Quote

Old   December 15, 2009, 18:30
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 11,282
Rep Power: 88
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
This is all discussed in the documentation. Have a look at tips for obtaining convergence.
ghorrocks is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
ERROR: Floating point exception: Overflow Elisabetta CFX 19 March 30, 2015 06:34
MPI Error - simpleFoam - Floating Point Exception scott OpenFOAM Running, Solving & CFD 3 April 13, 2012 16:34
reactingFoam floating point exception pajofego OpenFOAM 0 November 6, 2010 18:29
Error : floating point exception; overflow. maryam CFX 3 May 18, 2010 07:44
Gmsh and samplesurface touf Open Source Meshers: Gmsh, Netgen, CGNS, ... 2 December 10, 2007 03:27

All times are GMT -4. The time now is 05:52.